PSLE A store is having a book sale.
The 1st book is at 5% discount.
The 2nd book is at 25% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Yoko and Neave each bought two books at the sale.
- Yoko's books were priced at $22 and $25. How much did she pay for them?
- Neave paid a total of $57.45 for his two books. He paid $10.95 less for the 2nd book than the 1st book. What was the price of the 2nd book before discount?
|
1st book |
2nd book |
Total amount |
Original price
|
100% $25 |
100% $22 |
|
Discount |
- 5% |
- 25% |
|
Sale price |
95% |
75% |
? |
(a)
Selling price of the 1st book
= 95% x 25
=
95100 x 25
= $23.75
Selling price of 2nd book
= 75% x 22
=
75100 x 22
= $16.50
Total amount that Yoko paid
= 23.75 + 16.50
= $40.25
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 25% |
|
Sale price |
95%
|
75%
|
|
Compare 1st book and 2nd book |
1 u + $10.95 |
1 u |
$57.45 |
(b)
Sale price of the 1st book = 1 u + 10.95
Sale price of the 2nd book = 1 u
Total amount that Neave paid
= 1 u + 10.95 + 1 u
= 2 u + 10.95
2 u + 10.95 = 57.45
2 u = 57.45 - 10.95
2 u = 46.50
1 u = 46.50 ÷ 2 = 23.25
Sale price of the 2nd book = $23.25
75% of the price = $23.25
100% of the price =
23.2575 x 100 = $31
Selling price of the 2nd book before discount = $31
Answer(s): (a) $40.25; (b) $31